Description:

[Size] - 1/2-inch drive socket, H21 (21mm) hex bit, 3.07-inch (78mm) total length.. [Torque Strength] - Chrome molybdenum steel provides excellent durability and strength with every impact movement; black phosphate finish for extra protection against rust and corrosion.. [Chamfered Design] - Chamfered ends insert smoothly into fastener head, reducing wear.. [Pin Hole] - Individual pinhole base design adds extra security by placing in a locking pin for stability when exerting strong torque motion.. [Great Tools] - Use with ratchet to improve speed in tightening hex drive fasteners. And the product has no insulation properties and is not suitable for electrical environments..